Painted wood floor: fill in any large gouges or scrapes, and sand the entire floor lightly. you can use nearly any paint on the floor, but if you're concerned about it rubbing off with traffic, talk to the people in the paint store/department. you can also get clear acrylic sealer to paint over the floor once it's dried and once cured, it'll protect the paint job.
This is a great idea from Iron & Twine. It actually started as three Expedit shelving units from IKEA but when turned on its side, it offers a great storage and organization center that makes a perfect command station.